html {
    --text-colour: Grey;
    --background-colour: White;
    --hover-colour: Snow;

    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    color: var(--text-colour);
    background: var(--background-colour);
    font-family: Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark){
    html {
        --text-colour: DimGrey;
        --background-colour: Black;
        --hover-colour: #010612;
    }
}

a {
    color: DodgerBlue;
}

h1 {
    font-family: Georgia, serif;
    text-align: center;
}

.placard {
    animation: 2s ease-in-out 0.5s both fadeIn;
    padding: 0 1rem;
    border-radius: 10%;
    transition: background-color 1s ease-in-out;
}

.placard ul {
    list-style: none;
}

.placard:hover {
    background-color: var(--hover-colour);
}

.placard h1 {
    font-size: 3rem;
}

.placard p {
    font-size: 1.5rem;
}

.placard img {
    height: 30rem;
    border-radius: 10%;
}

.row {
    display: flex;
    flex-direction: row;
    align-items: center;
}

.col {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.main-axis {
    display: flex;
    flex-direction: row;
    align-items: center;
}

@media (orientation: portrait){
    .main-axis {
        flex-direction: column;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}